(1) This document gives design rules for the structural parts of bridges made of timber or other wood-based materials, either singly or compositely with concrete, steel or other materials. (2) The provisions of this document supplement, and in some cases modify or supersede, provisions given EN 1995-1-1. (3) Prestressed timber-concrete composite (TCC) members are not covered by this document. The design of stress-laminated timber decks used as part of a TCC system is covered. (4) TCC structures which rely on friction between wood and concrete are not covered by this document.